This is made of black PVC plastic, easy to take off. a wide range of applications adding protection and offering a neater finish. Made from a flexible PVC material, these caps can be easily moulded around irregular tubular shapes. A good production tool for the cylinder insulating sheath. Due to flexible we recommend to choose smaller cap according to threaded parts. Thread protector 50pcs (±2%), 9/16 inch round black vinyl end cap, cover rubber safety tip 9/16" Simply slide over the threaded end of the screw or bolt PVC Hose end caps can be used in stainless steel braided hoses, alloy hard pipe, etc Perfect for covering screws or other threaded parts Applies to: Rubber cap, PVC rubber sheath, rubber sets, rubber cover, rubber cap, thread protector